Incandescent lamp.



No.- 665,]I3. Patented Ian. I, I90I.

. A. KITSON.

INCANDESCENT LAMP,

(Ap plication filed Mar. '19, 1900. (No Model.)

. INVENTOR ,dzzm 1,

BY Mm ATTORNEY WITNESSES:

TH! Noizms PEYERS ca, momuma. wnsumqro a, uv c.

UNITED STATES PATENT OFFICE.

ARTHUR KITSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORTO THE KITSONHYDROCARBON HEATING AND INOANDESOEN'I LIGHTING COM- PANY, OF SAME PLACEAND CHARLESTON, WEST VIRGINIA.

INCANDESCENT LAMP.

SPECIFICATION forming part of Letters Patent No. 665,113, dated January1, 1901.

Application filed March 19. 1900. Serial No. 9,134. (No model.)

To aZZ whom it may concern:

Be it known that I, ARTHUR KITSON, a subject of the Queen of GreatBritain, and a resident of Philadelphia, (Germantown,) county ofPhiladelphia, State of Pennsylvania, have invented certain new anduseful Improvements in Incandescent Lamps, of which the following is aspecification.

My invention relates in general to lamps burning a combustible mixtureof gases or vaporized fuel and air under one or more incandescentmantles; and more specifically it consists of an improved form of lampof such character designed to burn kerosene, natural gas, or some otherform of fuel-gas devoid of enriching, or illuminating materials.

To this end my invention comprises a convenient arrangement forpreheating the air to be mixed with the fuel by means of the heat givenoff by the lamp itself; and the invention finds its simplest embodimentin an extension for the mixing-tube used in the standard form ofoilburning lamp of this character, said extension passing through thechimney of the lamp, so that the air passing through it is subjected tothe heat of the burners of the lamp and so delivered to the mixing-tubeproper in a heated condition.

The preferred form of apparatus embodying my invention is illustrated inthe accompanying sheet of drawings, in which Figure l is a sideelevation and partial section of a lamp with my invention appliedthereto. Fig. 2 is a detail in section showing the mixing-tube and itsextension,together with the fuel-supply tube. Fig. 3 is a similar Viewof a modification.

Throughout the drawings like referencefigures indicate like parts.

The lamp shown in Fig. 1 has a hemispherical glass globe l, a chimney 2above the same, and one or more burners 3 3, provided with incandescentmantles 3 below said chimney. These burners are mounted ona mixing-tube4, through which the combustible mixture of air and fuel is delivered tothe burner or burners. The fuel supply is through the tube 9, which inthe oil-burning lamp is a vaporizing-tube extending across the chimneyabove the burners and incandescent mantles and having itsdischarge-opening 6 for the jet of vapor over the open end of themixing-tube 4. The extension 7 for said mixing- .tube is preferably madeseparate. from the mixing-tube, and it extends through and across thechimney 2, above the tube 9, having a removable flared mouthpiece 8.

Any convenient means of connecting the mixing-tube with its extensionmay be employed; but 1 preferably use the couplingring 11, whichsurrounds the abutting ends of the tube and its extension and forms amuffcoupling for the two. Preferably this coupling-ring rests upon thefuel-supply tube 9, and the latter may have a notch 5 formed on itsupper side into which the ring may drop, as shown in the drawings.

In the modification shown in Fig. 3 a special arrangement for f uel-gasor prod ucer-gas is shown. The fuel-tube 9 is made shorter and does notextend across the lamp-chimney. The flexible tube 10, being connected tothe outer end of the fuel-tube 9*, delivers the gas under pressure, sothat it is discharged into the mixing-tube in a jet through the opening6 in the same manner as the jet of vapor is delivered in the oil-burninglamp.

The mode of operating my invention is of course evident from theforegoing description. The jet of gas or vapor delivered through thedischarge-opening 6 or 6 passes down the mixing-tube 4, drawing in withit the necessary amount of air to produce a combustible mixture. The airbeing drawn in through the extension 7 of the mixing-tube, which extendsacross the chimney 2, becomes highly heated. In taking the lamp apartthe coupling-ring 11 is lifted until it clears the upper end of themixing-tube 4, and then the extension 7 may be swung around and byremoving the flaring mouthpiece 8 the extension can be withdrawn fromthe lamp-chimney. The fuel-supply tube 9 or 9 can also be withdrawn fromthe mixing-tube for cleaning or replacement after the coupling-ring 11has been lifted clear of the notch 5. When the parts are reas sembled,the coupling-ring 9 drops down into the notch 5 and all the parts aresecurely locked together.

The advantages of my invention consist in the higher candle-powerproduced by the fact that the heated air adds to the heat given off bythe burners and also in the fact, where oil is used, that the preheatingof the air prevents any condensation of the oil in the mixing-tube. Thisis of considerable importance where low-grade oils are being used,whichare liable to deposit tar and similar impurities. The construction shownis also extremely convenient in that it can be applied to many thousandstandard lamps already manufactured by simply cutting the holes in thechimney for the extension 7, removing the m ufller, which usually isplaced over the mouthpiece of the mixing-tube, andassembling the partsas shown in Fig. 1.

It is evident, of course, that various changes could be made in thedetails of construction illustrated without departing from the spiritand scope of my invention, so long as the relative arrangement of partsor principle of op eration disclosed is preserved. Other forms ofextension-tube might be substituted and other arrangements for couplingand locking the parts together might be employed. The form offuel-supply tube and discharge-opening therein might be modified andother variations in form made and still leave the resulting constructionwithin the limits of my invention.

Having therefore described my invention, what I claim as new, and desireto protect by Letters Patent, is-

1. The combination of the lamp-casing and chimney above said casing, aburner located in the casing under the chimney, an incandescent mantlefor said burner, a mixing-tube for supplying a combustible mixture ofair and fuel tothe burner, and an air-supply tube connected as anextension of said mixing-tube and extending across the lamp-chimneytogether with detachable connecting means between said mixing-tube andthe extension thereof.

2. The combination of the lamp-casing and chimney above said casing, aburner located in the casing under the chimney, an incandescent mantlefor said burner, a mixing-tube for supplying a combustible mixture ofair and fuel to the burner, and an extension of said mixing-tube whichextends across the lamp-chimney, together with the vaporizingtubeextending across the chimney and discharging into the upper end of themixingtube, and a coupling-ring resting on said vaporizing-tube andsurrounding the abutting ends of the mixing-tube and of its extension.

3. The combination of the lamp-casing and chimney above said casing, aburner located in the casing under the chimney, an incandescent mantlefor said burner, a mixing-tube for supplying a combustible mixture ofair and fuel to the burner, and an extension of said mixing-tube whichextends across the lamp-chimney, together with the vaporizingtubeextending across the chimney and discharging into the upper end of themixingt-ube, and a coupling-ring resting on said vaporizing-tube andsurrounding the abutting ends of the vaporizing-tube and of itsextension, said vaporizing-tube having a notch formed on its uppersurface into which the coupling-rin g fits, whereby the parts are alllooked together.

L. The combination of the lamp-casing and chimney above said casing, aburner located in the casing under the chimney, an incandescent mantlefor said burner, a mixing-tube for supplying a combustible mixture ofair and fuel to the burner, and an extension of said mixing-tube whichextends across the lamp-chimney, together With a fuel-supply tube whichdischarges into the mouth of the mixing-tube proper and a coupling-ringwhich rests on the fuel-supply tube and surrounds the abutting ends ofthe mixing-tube proper, and of its extension.

5. The combination of the lamp-casing and chimney above said casing, aburner located in the casing under the chimney, an incandescent mantlefor said burner, a mixing-tube for supplying a combustible mixture ofair and fuel to the burner, and an extension of said mixing-tube whichextends across the lamp-chimney, together with a fuel-supply tube whichdischarges into the mouth of the mixing-tube proper and a coupling-ringwhich rests on the fuel-supply tube and surrounds the abutting ends ofthe mixing-tube proper, and of its extension, said fuel-supply tubehaving a notch in its upper surface into which the coupling-ring fits,whereby the parts are all looked together.

Signed at New York, N. Y., this 27th dayof February, 1900.

ARTHUR KITSON.

Witnesses:

W. H. PUMPHREY, A. PARKER-SMITH.

